In an array-based CGH, the analytical results of an evaluation of an abnormal number of copies are substantially affected by the designation of a cut off value for the ratio of the fluorescence intensity. In this study, we developed an array-based CGH analysis method that enables the designation of an optimal cut off value adapted to the analysis. With this method, the threshold of each BAC clone fluctuates automatically depending on the number of samples in order to enable the identification of a BAC clone correlated with the clinicopathological parameters…